Planooraph co



C. GUSTAFSON AND K. APPELGREN.

FORCE FEED LLLBHICATQR- APPLICATION FILED AUG6 |918.

1,308,417. Patented Ju1y1, 1919.

2 SHEETS-SHEET I.

` lll/111111101112 m *IIIIIIIII TMB cULUMulA PLANDURAPH no.. WASHINGTON. D. C.

STATES? PATENT O'FFC.

CARL GUSTAFSON, F SDERTELJE, AND KNUT APPELGREN, 0F LJUSNE, SWEDEN.

FORCE-FEED LUBRICATOR.

Specifica-tion of Letters Patent.

PatentedJuly 1, 1919.

Application filed August 6, 1918. Serial N o. 248,539.

i* citizen of the Kingdom of Sweden, residing at Sdertelje, Sweden, and KNUT APPEL- GREN, 4a citizen of the Kingdom of Sweden, residing at Ljusne, Sweden, have invented a new and useful :Improved F cree-Feed Lubricator, of which the following is a specification.

lThis invention relates to an improved .force-'feed lubricator having 'one or more pumps; and it consists in the construction of such a device in which the oil isitaken at .each suction stroke froma reservoir to the pump or pumps, and discharged by the punip or pumps at every other pressurestroke through a slght feed conduit, and then returned to'1 the reservoir, a correspondquantity of oil being at the neX-t pressure-stroke of the pump or pumps delivered;

lou-t through the discharge-passagev or pas- -sages to the point or points to be lubricated.

The invention particularly consists in the construction of a series of, preferably, equal `pump units, each including la pump cylinder, a plunger, and a reciprocating valve, and in the construction of means f-or moving the plunger's and lthevalves so as to cause the same to operate in the manner herein- .before stated'.A

Theinvention further consists in the construction and combination of the various parts" as more fully hereinafter described, and' particularly pointed out in the claims.

the accompanying drawing, which forms' part of this specification, Figure 1 is a'vertical cross-section through the entire lubricator according to a lpreferred embodiment o'f this invention. Fig. 2 shows a ksimilar section through a separatepump u nit 'the plunger of which is out of operative position; Fig. 3 is a horizontal section through part of aplu'nger and the driving means thereof. Figs. 4 and 5 show the means for transmitting motion from the driving shafts of the plungers to the valves,

said means being shown in two different,

positions. Figs. 6-9'y showvertical sections ofv a pumpunit in four diii'erent operative positions thereof. Fig. 10` is a horizontal section of a pump unit showing the Vvalve and its' driving means.

Referring to the drawing 1 indicates the oil reservoir or casing, in which a number ofl pump units is mounted, one such` unit only being shown in the drawing as all are inde'r 3 is' further provided with a T-'shaped passage, connected fat 23 withk the boring containing the plunger 4 and 4con'irnunicating at 24 and 25with the boring containing the valve 8. The valve 8 is formed with `a recess 26 adapted to vconnect the passages 21 and 24 withone another'. In connection with the recess 26, a transverse passage 27 is formed in the valve said passage being adapted to communicate in a certain position of the valve with the conduit 10 leadingto Ithe sightfeed glass 9 open at its vlower end into the reservoir. Another transverse passage 28. formed in the valve 8 connects in another position of the valve the passage 25 with a discharge passage 7 The plungersv4 are driven from a com- Infon driving shaft 2 throughthe intermedi'u'm of an eccentric 6 attached to said shaft and a rocking lever 5 pivotally connected to the rod 61 of said eccentric. The rocking lever 5 turns on a pivot 29, carried by a setscrew 30 by means of which the distance of the pivot 29 from the plunger 4 may be adjusted as desired. The connection between the rocking lever 5 and the plunger 4 is effected, by means of a thin end portion 31 of the plunger extending throughlan opening in a transversely extending rib 32 of the rocking lever 5 and being held in place by a in 33 (Fig. 3).

he valves 8 are driven fromy the shaft .2

through the intermedium of a common shaft y 34 parallel to the shaft 2. The connectiony spondingly curved edges of the Geneva stop. Between the ends of the flanges 16 sul'licient space is left for permitting the turning of the Geneva stop 13 when operated by a pin 15, as shown in Fig. 5.

Motion is transmitted from the shaft 34 to each of the valves 8 bymeans of an. eccentric 35 attached to the shaft 35, the rod 36 of which is pivotally connected to the end of the valve opposite to the shaft 34. p

The operation of the device hereinbefore described is as follows: At each revolution ments owing to the engagement between the concave outer edge of l,an arm ofthe Geneva stop and one of the flanges 16, as shown in Fig. 4. The Geneva stop is thus moved to and maintained` in four different successive positions as the plunger 4 perform two lcomplete cycles of operation. The power transmit- ,ting means `described are so adjusted with respect to each other as to efectthe movement of the Geneva stop just as the plungers are reversed at their one end positions -the Geneva stop and thus also the valves being locked in rtheir position while the plungers are moving between their end positions.

The four successive positions of one valve are shown in Figs. 6-9. In Fig. 6, the valve is in its central position while the plunger is performing its suction stroke. Oil will now be taken from the reservoir 1 through the pipe 20, the passage 21 andthe 'groove 22 to the recess 26, by way of said recess to the passage 24, 23 and from thence into the closed chamber in front of the plunger 4. In Fig. 7 the shaft 2 has made half a revolution, the, movement of the plunger has just been reversed, and the valve has been moved into its one end position. The oil reviously taken in by the pump will now e pressed from the chamber in front of the plunger through the passage 23', 24 and the passage 27 into the conduit 10 carrying the oil tol the sight feed glass `9, from which the oil' will be returned to the reservoir 1. The shaft 2 having again moved through half a revolution, the plunger 4 will again be reversed and the valve will'be in its central position (Fig. 8). Oil will now be taken from the reservoir 1 and delivered into the chamber in front of the plunger in the same way as above described with reference to Fig. 6. After the plunger has again been reversed and the valve has been moved into its opposite end position (Fig. 9), this oil will be forced out from the chamber infront 4 of the plunger through the passage 23, 25 and the passage 28 and delivered into the passage '7 and from thence the oil will be Vthe sight-feed conduit.

carried to the point to be lubricated. `llVith the above described construction, it will be seen, `that the'oil is pressed at' every other sight-feed glass into the discharge-passages whereby air would otherwise enter the oil during its' passage to the points beY- lubricated.

In force-feed lubricators of the above said kind, the amount of oil to be delivered is usually determined by providing an adjustableclearance or play of the means trans.

mitting motion to the plunger, so as `tofgive the plungery its largest stroke when this `play has its smallest value, and vice versa.V If,

cating cylinders of'steam engines or internal combustion engines, partA of the oil inithe Y however, -a 'certain'pressure must be overl -come bythe pumps, as for instance, in jlubrii90. f. dischargepipe willbe forced back into the"l pump cylinder as the passages of the 'said' v* pipe are uncovered, the amount of oil being -thus forced back depending upon the adjustment of such play or clearance.` This vwill cause the oill pressure withinthepipe line to vary at eachY stroke of the plungers. Y To overcomesaid inconvenience the regulation' of the length of the plunger stroke according to this invention is effected by means of the set-screw 30. In Fig. 1, the pivot 29 is shown 'in its uppermost position corre-'-A sponding to the largest stroke of the plunger.

According1 as the pivot 29V is depressed by turning t ey screw 30 the length of 'the plunger stroke will be successively decreased,

until when the axis of the' plunger v4 coincides with that of the pivot 29 no movement at all will be transmitted to the plunger.

What we claim, and desire to secure by Letters Patent, is as follows 1. In a force-feed lubricator the'combination with an oilv reservoir of a number of pump units mounted in said reservoir, each unit comprising a pump cylinder, a plunger and a reciprocating valve, a commondriving shaft for the plungers of said units, any# other common'shaft driven from saidir'st-fy mentioned shaft by means of a disk mounted,

on the said first-mentioned shaft and provided with two pins, and a Geneva, stop mounted on the said other shaft and havingfour recesses adapted to be engaged by said pins, said disk and said Geneva stop being y provided with coacting guiding means for maintaining the Geneva stop in position after each operation thereof, means for transmitting power from the shaftcarrying the u Geneva stop to the valves of the pump units,

suction'pipes and sight-feed conduits con- 130 j position to another just as the plungers are trolled b the valves, said conduits returning to the oi -reservoir, discharge-passages likey. wise controlled by said valves, passages .formed in the valves for connecting the pumps at each suction stroke with the oil res- 'ervoir through said suction pipes, at every other pressure stroke with the sight-feed conduits and at every other pressure stroke with the discharge-passages, the arrangement being such that the valves are moved from one reversed at their end positions.

v 2. In a force-feed lubricator the combinaf tion with anoil reservoir of a number of pump units, each comprising a pump cylinder, a plunger and a reciprocating valve, a common driving shaft *for the plungers of said units, another common shaft for driving the valves of said units, means for transmitting motion from said rst-mentioned shaftV to said last-mentioned shaftf suction pipes, sight-feed conduits controlled by said valves and returning to the reservoir, disycharge passages likewise controlled by said valves, and means for independently adjusting the length of the hub of the plungers, said means comprising a rocking operating lever for each plunger and means for adjusting the operative length of said rocking lever.

3. In a force-feed lubricator the combination with an oil reservoir of a number of pump units, each comprising a pump cylinder, a plunger and a reciprocating va1ve,a common driving shaft for the plungers of said units, another common shaft for driving the valvesl of said units, means for transmitting motion from said first-mentioned shaft to said last-mentioned shaft, suction pipes, sight-feed conduits controlled by said valves and returning to the reservoir, discharge passages likewise controlled by said valves, and means for independently adjusting the length of the hub of the plungers, said means comprising a rocking lever for each plunger, each lever being operatively connected to the common driving shaft for the plungers and further connected to the corresponding plunger, and mounted to turn on an adjustably mounted pivot.

In testimony whereof we have signed our names.

CARL GUSTAFSON. KNUT APPELGREN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

v A Washington, D. C. 

